When is necessary to use "its" and how to use it correctly?

Question

For example, I was writing the following sentence:

"Sony donates 5% of profit to good causes."

How can I know that is necessary to use "its" in that sentence, as follows:

"Sony donates 5% of its profit to good causes"

Answer 1

I would choose a third alternative. Use its. (See What is the best way to explain how to choose between "its" and "it's"?)

Sony donates 5% of its profit to good causes.